Process and apparatus for threading up continuous spinning machines



Jan; 18, 1949. VAN DER MB 2,459,254

PROCESS AND APPARATUS FOR THREADING UP CONTINUOUS SPINNING MACHINES Filed Nov. 14, 1946 Q4/2129 an def/[lei Patented Jan. 18, 1949 2,459,254 ICE KPROCESS. AND APPARAT UP CONTINUOUS S Anne van der Mei, Arnhem,

US FORTHREADIN G PINNING MACHINES Netherlands, assignor to American EnkaCor-poratiori, Enka, N. C., a

corporation of Delaware vApplication November 14, 1946, Serial No. 709,750 In-Germany Mayl26, 1941 .Section 1, .Public-Law 690, August 8, 1946 Patent expires May v26,- 1961 1 This invention relates to the continuous spinningofviscose yarn and is more particularly concerned with a method and apparatus'for the simultaneous'and continuous after-treatment of .aplura'lity. of rayonyarns moving between a point of extrusion and a point of collection.

In the type of continuous spinning to Whlch this invention relates, a plurality of freshly formed yarns are led from a spinning bath and areguided in parallel relationship by means of grooved rollers through a plurality of baths in which the yarns are contacted with various aftertreating liquids such as washing water and .desulphurizing agents. 'This type of spinning has the inherent advantage that a single after-itreat ingbath'may serve a large number of spinning positions, the yarns being led in parallel relationship over guide rollers into and through the after-treating liquid. However, in any spinning operation thereis occasionallyayarn rupture, and where a'number ofyarns are runningin-a single bath a yarn failure is particularly serious since the broken yarn must be retrieved from the after treating bath in whichbreakage occurred in such a-manner as to avoid tangling and inv.terference'with the other yarns that are still running in that bath. 7 'fIt is an object of the present invention,'therefore, 'to'provide a method'and apparatus for the "threading-up of a single thread or yarn in a continuous spinning machine of the type descrlbe'd'above, which method andapparatus are characterized by eflicient manipulation of the "broken yarn without interference with other yarnsrunning in'parallel relationship in the same after-treating bath.

Other objects and advantages of this invention will be apparent upon consideration of the following -detailed'description of a preferred embodiment thereof in conjunction with the 'an- 'nexed drawings, wherein:

"Figure 1 is a schematic view in side elevation ustrating'thefirst-stage of a threading-up operation-conducted inaccordance with the method of the-present invention and involving employment of the apparatus thereof;

Figure 2 is a view similar to Figure 1 but illustrating the second stage in a threading-up operation;

Figure 3 is also similar'to Figure l and serves to illustrate the third operation; and

Figure 4 is a view similar to Figure 1 illustrating the fourth or final step in the threadingup "operation.

Referring now to Figurell. inqgreater detail, a number of threads issuing from a number of spinnerettes, not shown, are led in parallel. re-

p in a threading-up v of that yarn are being taken up onroller "loop ov r; roller. 24.

ltreating series required for any particularyarn.

In View of the fact that all of the figuresof .drfawing areviews in and elevation, the path-deifined by the plurality of parallel threads appears lasfla single thread, and is indicated bythe reference numeral l9. The apparatus thus faradescribed is entirely conventional. It will be noted, howventhat the freely rotatable rollers l3, M and,l8..are not mounted byconventional means within the respective baths, but are supported on one endof. the arms of bell cranks 2-0,;2! and., 22 respectively. The other arm of each of the bell cranks supports another freely rotatable grooved roller, rollers 23, 24, and 25, .correspondingdn structure and functions .torthe rollers 13, [Land 48, also being supported by bell cranks .20, '21 and 22 respectively. Additionally theretareiprovi'ded driven rollers 26 and 21 located at, the lefthand edge of each bath. By. mounting thefreely rotatable rollers in pairs on bellcranks and by providing driven rollers such as;28.and 21,-,tan arrangement is provided whereby it=-is possible conveniently to thread-up the machine after breakage of an individual yarn. Let;it-,be.assumed thatone of ,the yarns l9, :which will :be hereinafter referred toas yarn l9a, breaks during the passage through the container l2. When th-is condition occurs the operator immediatelymulls the yarn [9a from the bath. I l and leads it :under ,ller=26. The roller immediately'avoided. After looping the yarn [.90 .around the roller 23 and when suceeding portions 26 the .opera-tor turns .thebell crank 20 in a counterclocktwisedirectiomias viewed in Figure 1, causing the roller 23tozassume the position formerly occupied Joy the-roller -|3. .This causes the yarnlSavto assume the-same position in the. left-handenid of 'the. .bath astheotheryarns which are running ,paralleleto it, seeFigure 2. At thispointithe ,operatorpullsa loop of yarn I Be between the 'roller123 andthedriven roller. 26,and...passes.this to bell crank (2 I, .as may be seen in Figure '3. Thereafter. the bell crank 21 is turned in a counterclockwise direction until the roller 24 assumes the position formerly occupied,

by the roller it, see Figure 4. At this time the yarn passed over the driven roller 19a. is separated from the driven roller 26,1 15, under roller 25 and wound around driven roller 21. From this point on, the threading-up of the machine through the bath l6 and any succeeding baths, is

effected in the manner previously described. After threading-up has been completed, the bell cranks 20 and 2! may be restored to their original posi tion by simply rotating them in .a clockwise direction. This movement, as will beuapparent' from a study of the drawings, will not affect the thread path through the various treatment baths and can be effected at any time duringthe running of the threads.

While the foregoing description has been concerned with but one form of the invention, it is apparent that various modifications are contemplated within the scope of the appended claims. For example, the pairs of unitary grooved rollers may be-disasserhbled into individual rollers, each having an individual groove for guiding a thread the improvement that comprises a, plurality of the freelyrotatable rollers linto substitutive positions.

4. In continuous spinning apparatus ing a liquid bath, means for feeding simultane- "ously a plurality of yarns to said bath and means for withdrawing simultaneously a plurality of yarns from said bath, the improvement that comprises two spaced pairs of freely rotatable rollers,

two bell. cranks, each of said bell cranks supporting one pair of rollers with the component rollers of the pair on itsopposite arms, each of said bell cranks being rotatable to move its rollers sucl cessively to andfrom a thread guiding position spaced yarn guiding elements, means for supporting said elements forsuccessive movement into a yarn guiding position within the bath and an idle position above the bath and driven yarn storage means located above said bath whereby,

upon yarn breakage, the running yarn end may be led from the feeding means to the storage means around an idle element and the latter may be moved into guiding position while the former guiding element is moved to an idle position.

2. In continuous spinning apparatus inclu ding a liquid bath, means for feeding simultaneously a plurality of yarns from said 'bath, an d means for withdrawing simultaneously a plurality of yarns from said bath, the improvement that comprises a pair of spaced yarn guiding elements, means supporting said elements for successive movement into a position for guiding a plurality of yarns within the loath and an idle position above the bath, and a driven storage roller located above the bath whereby, upon yarn breakage, the running end of the yarn may be led from the feeding means to the storage roller around the element in position above said bath, where upon the means supporting said elements may be actuated to move the elements into mutually substitutive p sitions. 1 l

3. In continuous spinning apparatus including a. liquid bath, meansfor feeding simultaneously a plurality .of yarns, to said bath and means for withdrawing simultaneously aplurality of yarns from said bath, the improvement that comprises a pair of spaced freely rotatable rollers, abell crank supporting one of said rollers on each of its arms, said bell crank being rotatable to move said rollers successively to and from a'position'guiding a plurality of yarns within the bath and an idle position above the bath, and a driven storage roller located above said bath whereby,

upon breakage of yarn; the running end may be led from the feeding means to the storage roller around the freely rotatable roller in idle'posltion, whereupon the bell crank may be rotated to move bath guiding element nearer within the bath and an idle position above the bath, and a driven storage roller located above said bath whereby, upon breakage of yarn, the running end may be led from the feeding means to the storage roller around the rollerin idle'po sition on one of the bell cranks, whereuponthat bell'c'rank may be rotated to move the freely r'otatable rollers into mutuallysubstitutive positions and then the same procedure is repeated. with the other bell crank. I

5. In the continuous spinning of rayon yarn that includes simultaneously delivering successive portions of a plurality of yarns to'an'after-treatment bath in the form of a warp, simultaneously withdrawing successive portions of said warpfroxn said baths while passing said warp under agguiding elementin said bath; the method of threading-up an individualyarn after breakage'that includes controlling thebroken end ofyarn issuing from the point of delivery and leading it under a guiding element disposed outside. of said bath to. a point of temporary collectionfoutsi'de said bath, and substituting said outside, guiding element for said bath guiding element to restore said broken yarn to normal position inisaidbath while avoiding disturbance of said running warp.

6. In the continuous spinning of r'ayon yarn that includes simultaneously delivering successive portions of a plurality of yarns to an after-treatment bath in the form of a warp, simultaneously withdrawing successive portions of said warp from said baths while passing said warp under a pair of spaced guiding elements disposed infs'aid bath, the methodof threading-up an. individual-yarn after breakage that comprises leading thebroken end of yarn issuingirom the point of deliveryundr a guiding'element disposed outside of said bath to a point of temporary collection also out.- side of said bath, substituting? saidloutside llid- ,ing element for the bath, guiding element nearer the point of delivery, pullinga loop between said point of temporary collection andsaid'substituted guiding element, passingsaid loop aroundanother guiding element disposedoutside ofsaidbath,

substituting said other guiding element for the thepoint ofwithdrawal, severing theyarn at the point ol5 ,temporary collection and leadingthe running endto the point of withdrawak j A ANNE-VANDERQIWEI.

REFERENCES CITED The following referencesareof recordin the {fileof' this patent: i

UNITED STATES E Ntniber. Date" I Name a, 1,555,864 McConnell Qct. 6,1925

' FOREIGNPZK'I'EliiIf Number, JjCountry ,ate. 756,229 Germany Sept. 25,1944

includ- 

